一下
近义词与同义词
按词义分组列出，使用时请结合具体语境。
a period of indeterminate length (usually short) marked by some action or condition; "he was here for a little while"; "I need to rest for a piece"; "a spell of good weather"; "a patch of bad weather"
基本解释
1.也说"一下子"。
2.犹言一次，一回。
3.突然，指时间短暂或动作迅速。
4.用于动词之后，表示略微之意。